See: https://github.com/docker/docker.github.io/pull/606
Also:
- Add missing redirects to API reference pages
- Remove v1.25 and 1.26, because they are being replaced with
swagger generated docs.
- Remove all other docs which aren't reference material, because
this can live in docker/docker.github.io
Signed-off-by: Ben Firshman <ben@firshman.co.uk>
